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* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (220 commits) USB: backlight, appledisplay: fix incomplete registration failure handling USB: pl2303: remove unnecessary reset of usb_device in urbs USB: ftdi_sio: remove obsolete check in unthrottle USB: ftdi_sio: remove unused tx_bytes counter USB: qcaux: driver for auxiliary serial ports on Qualcomm devices USB: pl2303: initial TIOCGSERIAL support USB: option: add Longcheer/Longsung vendor ID USB: fix I2C API usage in ohci-pnx4008. USB: usbmon: mask seconds properly in text API USB: sisusbvga: no unnecessary GFP_ATOMIC USB: storage: onetouch: unnecessary GFP_ATOMIC USB: serial: ftdi: add CONTEC vendor and product id USB: remove references to port->port.count from the serial drivers USB: tty: Prune uses of tty_request_room in the USB layer USB: tty: Add a function to insert a string of characters with the same flag USB: don't read past config->interface[] if usb_control_msg() fails in usb_reset_configuration() USB: tty: kill request_room for USB ACM class USB: tty: sort out the request_room handling for whiteheat USB: storage: fix misplaced parenthesis USB: vstusb.c: removal of driver for Vernier Software & Technology, Inc., devices and spectrometers ...
965 lines
25 KiB
C
965 lines
25 KiB
C
/*
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* USB Keyspan PDA / Xircom / Entregra Converter driver
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*
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* Copyright (C) 1999 - 2001 Greg Kroah-Hartman <greg@kroah.com>
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* Copyright (C) 1999, 2000 Brian Warner <warner@lothar.com>
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* Copyright (C) 2000 Al Borchers <borchers@steinerpoint.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* See Documentation/usb/usb-serial.txt for more information on using this
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* driver
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*
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* (09/07/2001) gkh
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* cleaned up the Xircom support. Added ids for Entregra device which is
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* the same as the Xircom device. Enabled the code to be compiled for
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* either Xircom or Keyspan devices.
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*
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* (08/11/2001) Cristian M. Craciunescu
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* support for Xircom PGSDB9
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*
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* (05/31/2001) gkh
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* switched from using spinlock to a semaphore, which fixes lots of
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* problems.
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*
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* (04/08/2001) gb
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* Identify version on module load.
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*
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* (11/01/2000) Adam J. Richter
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* usb_device_id table support
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*
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* (10/05/2000) gkh
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* Fixed bug with urb->dev not being set properly, now that the usb
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* core needs it.
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*
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* (08/28/2000) gkh
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* Added locks for SMP safeness.
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* Fixed MOD_INC and MOD_DEC logic and the ability to open a port more
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* than once.
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*
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* (07/20/2000) borchers
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* - keyspan_pda_write no longer sleeps if it is called on interrupt time;
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* PPP and the line discipline with stty echo on can call write on
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* interrupt time and this would cause an oops if write slept
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* - if keyspan_pda_write is in an interrupt, it will not call
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* usb_control_msg (which sleeps) to query the room in the device
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* buffer, it simply uses the current room value it has
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* - if the urb is busy or if it is throttled keyspan_pda_write just
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* returns 0, rather than sleeping to wait for this to change; the
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* write_chan code in n_tty.c will sleep if needed before calling
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* keyspan_pda_write again
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* - if the device needs to be unthrottled, write now queues up the
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* call to usb_control_msg (which sleeps) to unthrottle the device
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* - the wakeups from keyspan_pda_write_bulk_callback are queued rather
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* than done directly from the callback to avoid the race in write_chan
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* - keyspan_pda_chars_in_buffer also indicates its buffer is full if the
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* urb status is -EINPROGRESS, meaning it cannot write at the moment
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*
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* (07/19/2000) gkh
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* Added module_init and module_exit functions to handle the fact that this
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* driver is a loadable module now.
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*
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* (03/26/2000) gkh
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* Split driver up into device specific pieces.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/tty.h>
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#include <linux/tty_driver.h>
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#include <linux/tty_flip.h>
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#include <linux/module.h>
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#include <linux/spinlock.h>
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#include <linux/workqueue.h>
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#include <linux/firmware.h>
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#include <linux/ihex.h>
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#include <linux/uaccess.h>
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#include <linux/usb.h>
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#include <linux/usb/serial.h>
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static int debug;
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/* make a simple define to handle if we are compiling keyspan_pda or xircom support */
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#if defined(CONFIG_USB_SERIAL_KEYSPAN_PDA) || defined(CONFIG_USB_SERIAL_KEYSPAN_PDA_MODULE)
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#define KEYSPAN
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#else
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#undef KEYSPAN
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#endif
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#if defined(CONFIG_USB_SERIAL_XIRCOM) || defined(CONFIG_USB_SERIAL_XIRCOM_MODULE)
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#define XIRCOM
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#else
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#undef XIRCOM
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#endif
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/*
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* Version Information
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*/
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#define DRIVER_VERSION "v1.1"
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#define DRIVER_AUTHOR "Brian Warner <warner@lothar.com>"
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#define DRIVER_DESC "USB Keyspan PDA Converter driver"
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struct keyspan_pda_private {
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int tx_room;
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int tx_throttled;
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struct work_struct wakeup_work;
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struct work_struct unthrottle_work;
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struct usb_serial *serial;
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struct usb_serial_port *port;
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};
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#define KEYSPAN_VENDOR_ID 0x06cd
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#define KEYSPAN_PDA_FAKE_ID 0x0103
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#define KEYSPAN_PDA_ID 0x0104 /* no clue */
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/* For Xircom PGSDB9 and older Entregra version of the same device */
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#define XIRCOM_VENDOR_ID 0x085a
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#define XIRCOM_FAKE_ID 0x8027
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#define ENTREGRA_VENDOR_ID 0x1645
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#define ENTREGRA_FAKE_ID 0x8093
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static const struct usb_device_id id_table_combined[] = {
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#ifdef KEYSPAN
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{ USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
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#endif
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#ifdef XIRCOM
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{ USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
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{ USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) },
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#endif
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{ USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
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{ } /* Terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, id_table_combined);
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static struct usb_driver keyspan_pda_driver = {
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.name = "keyspan_pda",
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.probe = usb_serial_probe,
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.disconnect = usb_serial_disconnect,
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.id_table = id_table_combined,
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.no_dynamic_id = 1,
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};
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static const struct usb_device_id id_table_std[] = {
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{ USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
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{ } /* Terminating entry */
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};
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#ifdef KEYSPAN
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static const struct usb_device_id id_table_fake[] = {
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{ USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
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{ } /* Terminating entry */
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};
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#endif
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#ifdef XIRCOM
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static const struct usb_device_id id_table_fake_xircom[] = {
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{ USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
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{ USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) },
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{ }
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};
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#endif
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static void keyspan_pda_wakeup_write(struct work_struct *work)
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{
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struct keyspan_pda_private *priv =
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container_of(work, struct keyspan_pda_private, wakeup_work);
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struct usb_serial_port *port = priv->port;
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struct tty_struct *tty = tty_port_tty_get(&port->port);
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tty_wakeup(tty);
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tty_kref_put(tty);
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}
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static void keyspan_pda_request_unthrottle(struct work_struct *work)
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{
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struct keyspan_pda_private *priv =
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container_of(work, struct keyspan_pda_private, unthrottle_work);
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struct usb_serial *serial = priv->serial;
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int result;
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dbg(" request_unthrottle");
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/* ask the device to tell us when the tx buffer becomes
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sufficiently empty */
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result = usb_control_msg(serial->dev,
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usb_sndctrlpipe(serial->dev, 0),
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7, /* request_unthrottle */
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USB_TYPE_VENDOR | USB_RECIP_INTERFACE
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| USB_DIR_OUT,
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16, /* value: threshold */
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0, /* index */
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NULL,
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0,
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2000);
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if (result < 0)
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dbg("%s - error %d from usb_control_msg",
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__func__, result);
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}
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static void keyspan_pda_rx_interrupt(struct urb *urb)
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{
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struct usb_serial_port *port = urb->context;
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struct tty_struct *tty = tty_port_tty_get(&port->port);
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unsigned char *data = urb->transfer_buffer;
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int retval;
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int status = urb->status;
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struct keyspan_pda_private *priv;
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priv = usb_get_serial_port_data(port);
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switch (status) {
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case 0:
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/* success */
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break;
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case -ECONNRESET:
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case -ENOENT:
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case -ESHUTDOWN:
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/* this urb is terminated, clean up */
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dbg("%s - urb shutting down with status: %d",
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__func__, status);
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goto out;
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default:
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dbg("%s - nonzero urb status received: %d",
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__func__, status);
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goto exit;
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}
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/* see if the message is data or a status interrupt */
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switch (data[0]) {
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case 0:
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/* rest of message is rx data */
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if (urb->actual_length) {
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tty_insert_flip_string(tty, data + 1,
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urb->actual_length - 1);
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tty_flip_buffer_push(tty);
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}
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break;
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case 1:
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/* status interrupt */
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dbg(" rx int, d1=%d, d2=%d", data[1], data[2]);
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switch (data[1]) {
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case 1: /* modemline change */
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break;
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case 2: /* tx unthrottle interrupt */
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priv->tx_throttled = 0;
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/* queue up a wakeup at scheduler time */
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schedule_work(&priv->wakeup_work);
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break;
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default:
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break;
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}
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break;
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default:
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break;
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}
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exit:
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retval = usb_submit_urb(urb, GFP_ATOMIC);
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if (retval)
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dev_err(&port->dev,
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"%s - usb_submit_urb failed with result %d",
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__func__, retval);
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out:
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tty_kref_put(tty);
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}
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static void keyspan_pda_rx_throttle(struct tty_struct *tty)
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{
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/* stop receiving characters. We just turn off the URB request, and
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let chars pile up in the device. If we're doing hardware
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flowcontrol, the device will signal the other end when its buffer
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fills up. If we're doing XON/XOFF, this would be a good time to
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send an XOFF, although it might make sense to foist that off
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upon the device too. */
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struct usb_serial_port *port = tty->driver_data;
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dbg("keyspan_pda_rx_throttle port %d", port->number);
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usb_kill_urb(port->interrupt_in_urb);
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}
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static void keyspan_pda_rx_unthrottle(struct tty_struct *tty)
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{
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struct usb_serial_port *port = tty->driver_data;
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/* just restart the receive interrupt URB */
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dbg("keyspan_pda_rx_unthrottle port %d", port->number);
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port->interrupt_in_urb->dev = port->serial->dev;
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if (usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL))
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dbg(" usb_submit_urb(read urb) failed");
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return;
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}
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static speed_t keyspan_pda_setbaud(struct usb_serial *serial, speed_t baud)
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{
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int rc;
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int bindex;
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switch (baud) {
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case 110:
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bindex = 0;
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break;
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case 300:
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bindex = 1;
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break;
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case 1200:
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bindex = 2;
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break;
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case 2400:
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bindex = 3;
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break;
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case 4800:
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bindex = 4;
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break;
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case 9600:
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bindex = 5;
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break;
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case 19200:
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bindex = 6;
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break;
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case 38400:
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bindex = 7;
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break;
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case 57600:
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bindex = 8;
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break;
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case 115200:
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bindex = 9;
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break;
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default:
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bindex = 5; /* Default to 9600 */
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baud = 9600;
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}
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/* rather than figure out how to sleep while waiting for this
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to complete, I just use the "legacy" API. */
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rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
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0, /* set baud */
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USB_TYPE_VENDOR
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| USB_RECIP_INTERFACE
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| USB_DIR_OUT, /* type */
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bindex, /* value */
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0, /* index */
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NULL, /* &data */
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0, /* size */
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2000); /* timeout */
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if (rc < 0)
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return 0;
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return baud;
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}
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|
|
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static void keyspan_pda_break_ctl(struct tty_struct *tty, int break_state)
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{
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struct usb_serial_port *port = tty->driver_data;
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struct usb_serial *serial = port->serial;
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int value;
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int result;
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if (break_state == -1)
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value = 1; /* start break */
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else
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value = 0; /* clear break */
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result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
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4, /* set break */
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USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
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value, 0, NULL, 0, 2000);
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if (result < 0)
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dbg("%s - error %d from usb_control_msg",
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__func__, result);
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/* there is something funky about this.. the TCSBRK that 'cu' performs
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ought to translate into a break_ctl(-1),break_ctl(0) pair HZ/4
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seconds apart, but it feels like the break sent isn't as long as it
|
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is on /dev/ttyS0 */
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}
|
|
|
|
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static void keyspan_pda_set_termios(struct tty_struct *tty,
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struct usb_serial_port *port, struct ktermios *old_termios)
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{
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struct usb_serial *serial = port->serial;
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speed_t speed;
|
|
|
|
/* cflag specifies lots of stuff: number of stop bits, parity, number
|
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of data bits, baud. What can the device actually handle?:
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CSTOPB (1 stop bit or 2)
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PARENB (parity)
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CSIZE (5bit .. 8bit)
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There is minimal hw support for parity (a PSW bit seems to hold the
|
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parity of whatever is in the accumulator). The UART either deals
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with 10 bits (start, 8 data, stop) or 11 bits (start, 8 data,
|
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1 special, stop). So, with firmware changes, we could do:
|
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8N1: 10 bit
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8N2: 11 bit, extra bit always (mark?)
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8[EOMS]1: 11 bit, extra bit is parity
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7[EOMS]1: 10 bit, b0/b7 is parity
|
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7[EOMS]2: 11 bit, b0/b7 is parity, extra bit always (mark?)
|
|
|
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HW flow control is dictated by the tty->termios->c_cflags & CRTSCTS
|
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bit.
|
|
|
|
For now, just do baud. */
|
|
|
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speed = tty_get_baud_rate(tty);
|
|
speed = keyspan_pda_setbaud(serial, speed);
|
|
|
|
if (speed == 0) {
|
|
dbg("can't handle requested baud rate");
|
|
/* It hasn't changed so.. */
|
|
speed = tty_termios_baud_rate(old_termios);
|
|
}
|
|
/* Only speed can change so copy the old h/w parameters
|
|
then encode the new speed */
|
|
tty_termios_copy_hw(tty->termios, old_termios);
|
|
tty_encode_baud_rate(tty, speed, speed);
|
|
}
|
|
|
|
|
|
/* modem control pins: DTR and RTS are outputs and can be controlled.
|
|
DCD, RI, DSR, CTS are inputs and can be read. All outputs can also be
|
|
read. The byte passed is: DTR(b7) DCD RI DSR CTS RTS(b2) unused unused */
|
|
|
|
static int keyspan_pda_get_modem_info(struct usb_serial *serial,
|
|
unsigned char *value)
|
|
{
|
|
int rc;
|
|
u8 *data;
|
|
|
|
data = kmalloc(1, GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
|
|
3, /* get pins */
|
|
USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_IN,
|
|
0, 0, data, 1, 2000);
|
|
if (rc >= 0)
|
|
*value = *data;
|
|
|
|
kfree(data);
|
|
return rc;
|
|
}
|
|
|
|
|
|
static int keyspan_pda_set_modem_info(struct usb_serial *serial,
|
|
unsigned char value)
|
|
{
|
|
int rc;
|
|
rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
|
|
3, /* set pins */
|
|
USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_OUT,
|
|
value, 0, NULL, 0, 2000);
|
|
return rc;
|
|
}
|
|
|
|
static int keyspan_pda_tiocmget(struct tty_struct *tty, struct file *file)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct usb_serial *serial = port->serial;
|
|
int rc;
|
|
unsigned char status;
|
|
int value;
|
|
|
|
rc = keyspan_pda_get_modem_info(serial, &status);
|
|
if (rc < 0)
|
|
return rc;
|
|
value =
|
|
((status & (1<<7)) ? TIOCM_DTR : 0) |
|
|
((status & (1<<6)) ? TIOCM_CAR : 0) |
|
|
((status & (1<<5)) ? TIOCM_RNG : 0) |
|
|
((status & (1<<4)) ? TIOCM_DSR : 0) |
|
|
((status & (1<<3)) ? TIOCM_CTS : 0) |
|
|
((status & (1<<2)) ? TIOCM_RTS : 0);
|
|
return value;
|
|
}
|
|
|
|
static int keyspan_pda_tiocmset(struct tty_struct *tty, struct file *file,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct usb_serial *serial = port->serial;
|
|
int rc;
|
|
unsigned char status;
|
|
|
|
rc = keyspan_pda_get_modem_info(serial, &status);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
if (set & TIOCM_RTS)
|
|
status |= (1<<2);
|
|
if (set & TIOCM_DTR)
|
|
status |= (1<<7);
|
|
|
|
if (clear & TIOCM_RTS)
|
|
status &= ~(1<<2);
|
|
if (clear & TIOCM_DTR)
|
|
status &= ~(1<<7);
|
|
rc = keyspan_pda_set_modem_info(serial, status);
|
|
return rc;
|
|
}
|
|
|
|
static int keyspan_pda_write(struct tty_struct *tty,
|
|
struct usb_serial_port *port, const unsigned char *buf, int count)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
int request_unthrottle = 0;
|
|
int rc = 0;
|
|
struct keyspan_pda_private *priv;
|
|
|
|
priv = usb_get_serial_port_data(port);
|
|
/* guess how much room is left in the device's ring buffer, and if we
|
|
want to send more than that, check first, updating our notion of
|
|
what is left. If our write will result in no room left, ask the
|
|
device to give us an interrupt when the room available rises above
|
|
a threshold, and hold off all writers (eventually, those using
|
|
select() or poll() too) until we receive that unthrottle interrupt.
|
|
Block if we can't write anything at all, otherwise write as much as
|
|
we can. */
|
|
dbg("keyspan_pda_write(%d)", count);
|
|
if (count == 0) {
|
|
dbg(" write request of 0 bytes");
|
|
return 0;
|
|
}
|
|
|
|
/* we might block because of:
|
|
the TX urb is in-flight (wait until it completes)
|
|
the device is full (wait until it says there is room)
|
|
*/
|
|
spin_lock_bh(&port->lock);
|
|
if (port->write_urb_busy || priv->tx_throttled) {
|
|
spin_unlock_bh(&port->lock);
|
|
return 0;
|
|
}
|
|
port->write_urb_busy = 1;
|
|
spin_unlock_bh(&port->lock);
|
|
|
|
/* At this point the URB is in our control, nobody else can submit it
|
|
again (the only sudden transition was the one from EINPROGRESS to
|
|
finished). Also, the tx process is not throttled. So we are
|
|
ready to write. */
|
|
|
|
count = (count > port->bulk_out_size) ? port->bulk_out_size : count;
|
|
|
|
/* Check if we might overrun the Tx buffer. If so, ask the
|
|
device how much room it really has. This is done only on
|
|
scheduler time, since usb_control_msg() sleeps. */
|
|
if (count > priv->tx_room && !in_interrupt()) {
|
|
u8 *room;
|
|
|
|
room = kmalloc(1, GFP_KERNEL);
|
|
if (!room) {
|
|
rc = -ENOMEM;
|
|
goto exit;
|
|
}
|
|
|
|
rc = usb_control_msg(serial->dev,
|
|
usb_rcvctrlpipe(serial->dev, 0),
|
|
6, /* write_room */
|
|
USB_TYPE_VENDOR | USB_RECIP_INTERFACE
|
|
| USB_DIR_IN,
|
|
0, /* value: 0 means "remaining room" */
|
|
0, /* index */
|
|
room,
|
|
1,
|
|
2000);
|
|
if (rc > 0) {
|
|
dbg(" roomquery says %d", *room);
|
|
priv->tx_room = *room;
|
|
}
|
|
kfree(room);
|
|
if (rc < 0) {
|
|
dbg(" roomquery failed");
|
|
goto exit;
|
|
}
|
|
if (rc == 0) {
|
|
dbg(" roomquery returned 0 bytes");
|
|
rc = -EIO; /* device didn't return any data */
|
|
goto exit;
|
|
}
|
|
}
|
|
if (count > priv->tx_room) {
|
|
/* we're about to completely fill the Tx buffer, so
|
|
we'll be throttled afterwards. */
|
|
count = priv->tx_room;
|
|
request_unthrottle = 1;
|
|
}
|
|
|
|
if (count) {
|
|
/* now transfer data */
|
|
memcpy(port->write_urb->transfer_buffer, buf, count);
|
|
/* send the data out the bulk port */
|
|
port->write_urb->transfer_buffer_length = count;
|
|
|
|
priv->tx_room -= count;
|
|
|
|
port->write_urb->dev = port->serial->dev;
|
|
rc = usb_submit_urb(port->write_urb, GFP_ATOMIC);
|
|
if (rc) {
|
|
dbg(" usb_submit_urb(write bulk) failed");
|
|
goto exit;
|
|
}
|
|
} else {
|
|
/* There wasn't any room left, so we are throttled until
|
|
the buffer empties a bit */
|
|
request_unthrottle = 1;
|
|
}
|
|
|
|
if (request_unthrottle) {
|
|
priv->tx_throttled = 1; /* block writers */
|
|
schedule_work(&priv->unthrottle_work);
|
|
}
|
|
|
|
rc = count;
|
|
exit:
|
|
if (rc < 0)
|
|
port->write_urb_busy = 0;
|
|
return rc;
|
|
}
|
|
|
|
|
|
static void keyspan_pda_write_bulk_callback(struct urb *urb)
|
|
{
|
|
struct usb_serial_port *port = urb->context;
|
|
struct keyspan_pda_private *priv;
|
|
|
|
port->write_urb_busy = 0;
|
|
priv = usb_get_serial_port_data(port);
|
|
|
|
/* queue up a wakeup at scheduler time */
|
|
schedule_work(&priv->wakeup_work);
|
|
}
|
|
|
|
|
|
static int keyspan_pda_write_room(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct keyspan_pda_private *priv;
|
|
priv = usb_get_serial_port_data(port);
|
|
/* used by n_tty.c for processing of tabs and such. Giving it our
|
|
conservative guess is probably good enough, but needs testing by
|
|
running a console through the device. */
|
|
return priv->tx_room;
|
|
}
|
|
|
|
|
|
static int keyspan_pda_chars_in_buffer(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct keyspan_pda_private *priv;
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
priv = usb_get_serial_port_data(port);
|
|
|
|
/* when throttled, return at least WAKEUP_CHARS to tell select() (via
|
|
n_tty.c:normal_poll() ) that we're not writeable. */
|
|
|
|
spin_lock_irqsave(&port->lock, flags);
|
|
if (port->write_urb_busy || priv->tx_throttled)
|
|
ret = 256;
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
|
|
static void keyspan_pda_dtr_rts(struct usb_serial_port *port, int on)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
|
|
if (serial->dev) {
|
|
if (on)
|
|
keyspan_pda_set_modem_info(serial, (1<<7) | (1<< 2));
|
|
else
|
|
keyspan_pda_set_modem_info(serial, 0);
|
|
}
|
|
}
|
|
|
|
static int keyspan_pda_carrier_raised(struct usb_serial_port *port)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
unsigned char modembits;
|
|
|
|
/* If we can read the modem status and the DCD is low then
|
|
carrier is not raised yet */
|
|
if (keyspan_pda_get_modem_info(serial, &modembits) >= 0) {
|
|
if (!(modembits & (1>>6)))
|
|
return 0;
|
|
}
|
|
/* Carrier raised, or we failed (eg disconnected) so
|
|
progress accordingly */
|
|
return 1;
|
|
}
|
|
|
|
|
|
static int keyspan_pda_open(struct tty_struct *tty,
|
|
struct usb_serial_port *port)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
u8 *room;
|
|
int rc = 0;
|
|
struct keyspan_pda_private *priv;
|
|
|
|
/* find out how much room is in the Tx ring */
|
|
room = kmalloc(1, GFP_KERNEL);
|
|
if (!room)
|
|
return -ENOMEM;
|
|
|
|
rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
|
|
6, /* write_room */
|
|
USB_TYPE_VENDOR | USB_RECIP_INTERFACE
|
|
| USB_DIR_IN,
|
|
0, /* value */
|
|
0, /* index */
|
|
room,
|
|
1,
|
|
2000);
|
|
if (rc < 0) {
|
|
dbg("%s - roomquery failed", __func__);
|
|
goto error;
|
|
}
|
|
if (rc == 0) {
|
|
dbg("%s - roomquery returned 0 bytes", __func__);
|
|
rc = -EIO;
|
|
goto error;
|
|
}
|
|
priv = usb_get_serial_port_data(port);
|
|
priv->tx_room = *room;
|
|
priv->tx_throttled = *room ? 0 : 1;
|
|
|
|
/*Start reading from the device*/
|
|
port->interrupt_in_urb->dev = serial->dev;
|
|
rc = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
|
|
if (rc) {
|
|
dbg("%s - usb_submit_urb(read int) failed", __func__);
|
|
goto error;
|
|
}
|
|
error:
|
|
kfree(room);
|
|
return rc;
|
|
}
|
|
static void keyspan_pda_close(struct usb_serial_port *port)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
|
|
if (serial->dev) {
|
|
/* shutdown our bulk reads and writes */
|
|
usb_kill_urb(port->write_urb);
|
|
usb_kill_urb(port->interrupt_in_urb);
|
|
}
|
|
}
|
|
|
|
|
|
/* download the firmware to a "fake" device (pre-renumeration) */
|
|
static int keyspan_pda_fake_startup(struct usb_serial *serial)
|
|
{
|
|
int response;
|
|
const char *fw_name;
|
|
const struct ihex_binrec *record;
|
|
const struct firmware *fw;
|
|
|
|
/* download the firmware here ... */
|
|
response = ezusb_set_reset(serial, 1);
|
|
|
|
if (0) { ; }
|
|
#ifdef KEYSPAN
|
|
else if (le16_to_cpu(serial->dev->descriptor.idVendor) == KEYSPAN_VENDOR_ID)
|
|
fw_name = "keyspan_pda/keyspan_pda.fw";
|
|
#endif
|
|
#ifdef XIRCOM
|
|
else if ((le16_to_cpu(serial->dev->descriptor.idVendor) == XIRCOM_VENDOR_ID) ||
|
|
(le16_to_cpu(serial->dev->descriptor.idVendor) == ENTREGRA_VENDOR_ID))
|
|
fw_name = "keyspan_pda/xircom_pgs.fw";
|
|
#endif
|
|
else {
|
|
dev_err(&serial->dev->dev, "%s: unknown vendor, aborting.\n",
|
|
__func__);
|
|
return -ENODEV;
|
|
}
|
|
if (request_ihex_firmware(&fw, fw_name, &serial->dev->dev)) {
|
|
dev_err(&serial->dev->dev, "failed to load firmware \"%s\"\n",
|
|
fw_name);
|
|
return -ENOENT;
|
|
}
|
|
record = (const struct ihex_binrec *)fw->data;
|
|
|
|
while (record) {
|
|
response = ezusb_writememory(serial, be32_to_cpu(record->addr),
|
|
(unsigned char *)record->data,
|
|
be16_to_cpu(record->len), 0xa0);
|
|
if (response < 0) {
|
|
dev_err(&serial->dev->dev, "ezusb_writememory failed "
|
|
"for Keyspan PDA firmware (%d %04X %p %d)\n",
|
|
response, be32_to_cpu(record->addr),
|
|
record->data, be16_to_cpu(record->len));
|
|
break;
|
|
}
|
|
record = ihex_next_binrec(record);
|
|
}
|
|
release_firmware(fw);
|
|
/* bring device out of reset. Renumeration will occur in a moment
|
|
and the new device will bind to the real driver */
|
|
response = ezusb_set_reset(serial, 0);
|
|
|
|
/* we want this device to fail to have a driver assigned to it. */
|
|
return 1;
|
|
}
|
|
|
|
#ifdef KEYSPAN
|
|
MODULE_FIRMWARE("keyspan_pda/keyspan_pda.fw");
|
|
#endif
|
|
#ifdef XIRCOM
|
|
MODULE_FIRMWARE("keyspan_pda/xircom_pgs.fw");
|
|
#endif
|
|
|
|
static int keyspan_pda_startup(struct usb_serial *serial)
|
|
{
|
|
|
|
struct keyspan_pda_private *priv;
|
|
|
|
/* allocate the private data structures for all ports. Well, for all
|
|
one ports. */
|
|
|
|
priv = kmalloc(sizeof(struct keyspan_pda_private), GFP_KERNEL);
|
|
if (!priv)
|
|
return 1; /* error */
|
|
usb_set_serial_port_data(serial->port[0], priv);
|
|
init_waitqueue_head(&serial->port[0]->write_wait);
|
|
INIT_WORK(&priv->wakeup_work, keyspan_pda_wakeup_write);
|
|
INIT_WORK(&priv->unthrottle_work, keyspan_pda_request_unthrottle);
|
|
priv->serial = serial;
|
|
priv->port = serial->port[0];
|
|
return 0;
|
|
}
|
|
|
|
static void keyspan_pda_release(struct usb_serial *serial)
|
|
{
|
|
dbg("%s", __func__);
|
|
|
|
kfree(usb_get_serial_port_data(serial->port[0]));
|
|
}
|
|
|
|
#ifdef KEYSPAN
|
|
static struct usb_serial_driver keyspan_pda_fake_device = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "keyspan_pda_pre",
|
|
},
|
|
.description = "Keyspan PDA - (prerenumeration)",
|
|
.usb_driver = &keyspan_pda_driver,
|
|
.id_table = id_table_fake,
|
|
.num_ports = 1,
|
|
.attach = keyspan_pda_fake_startup,
|
|
};
|
|
#endif
|
|
|
|
#ifdef XIRCOM
|
|
static struct usb_serial_driver xircom_pgs_fake_device = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "xircom_no_firm",
|
|
},
|
|
.description = "Xircom / Entregra PGS - (prerenumeration)",
|
|
.usb_driver = &keyspan_pda_driver,
|
|
.id_table = id_table_fake_xircom,
|
|
.num_ports = 1,
|
|
.attach = keyspan_pda_fake_startup,
|
|
};
|
|
#endif
|
|
|
|
static struct usb_serial_driver keyspan_pda_device = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "keyspan_pda",
|
|
},
|
|
.description = "Keyspan PDA",
|
|
.usb_driver = &keyspan_pda_driver,
|
|
.id_table = id_table_std,
|
|
.num_ports = 1,
|
|
.dtr_rts = keyspan_pda_dtr_rts,
|
|
.carrier_raised = keyspan_pda_carrier_raised,
|
|
.open = keyspan_pda_open,
|
|
.close = keyspan_pda_close,
|
|
.write = keyspan_pda_write,
|
|
.write_room = keyspan_pda_write_room,
|
|
.write_bulk_callback = keyspan_pda_write_bulk_callback,
|
|
.read_int_callback = keyspan_pda_rx_interrupt,
|
|
.chars_in_buffer = keyspan_pda_chars_in_buffer,
|
|
.throttle = keyspan_pda_rx_throttle,
|
|
.unthrottle = keyspan_pda_rx_unthrottle,
|
|
.set_termios = keyspan_pda_set_termios,
|
|
.break_ctl = keyspan_pda_break_ctl,
|
|
.tiocmget = keyspan_pda_tiocmget,
|
|
.tiocmset = keyspan_pda_tiocmset,
|
|
.attach = keyspan_pda_startup,
|
|
.release = keyspan_pda_release,
|
|
};
|
|
|
|
|
|
static int __init keyspan_pda_init(void)
|
|
{
|
|
int retval;
|
|
retval = usb_serial_register(&keyspan_pda_device);
|
|
if (retval)
|
|
goto failed_pda_register;
|
|
#ifdef KEYSPAN
|
|
retval = usb_serial_register(&keyspan_pda_fake_device);
|
|
if (retval)
|
|
goto failed_pda_fake_register;
|
|
#endif
|
|
#ifdef XIRCOM
|
|
retval = usb_serial_register(&xircom_pgs_fake_device);
|
|
if (retval)
|
|
goto failed_xircom_register;
|
|
#endif
|
|
retval = usb_register(&keyspan_pda_driver);
|
|
if (retval)
|
|
goto failed_usb_register;
|
|
printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
|
|
DRIVER_DESC "\n");
|
|
return 0;
|
|
failed_usb_register:
|
|
#ifdef XIRCOM
|
|
usb_serial_deregister(&xircom_pgs_fake_device);
|
|
failed_xircom_register:
|
|
#endif /* XIRCOM */
|
|
#ifdef KEYSPAN
|
|
usb_serial_deregister(&keyspan_pda_fake_device);
|
|
#endif
|
|
#ifdef KEYSPAN
|
|
failed_pda_fake_register:
|
|
#endif
|
|
usb_serial_deregister(&keyspan_pda_device);
|
|
failed_pda_register:
|
|
return retval;
|
|
}
|
|
|
|
|
|
static void __exit keyspan_pda_exit(void)
|
|
{
|
|
usb_deregister(&keyspan_pda_driver);
|
|
usb_serial_deregister(&keyspan_pda_device);
|
|
#ifdef KEYSPAN
|
|
usb_serial_deregister(&keyspan_pda_fake_device);
|
|
#endif
|
|
#ifdef XIRCOM
|
|
usb_serial_deregister(&xircom_pgs_fake_device);
|
|
#endif
|
|
}
|
|
|
|
|
|
module_init(keyspan_pda_init);
|
|
module_exit(keyspan_pda_exit);
|
|
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_param(debug, bool, S_IRUGO | S_IWUSR);
|
|
MODULE_PARM_DESC(debug, "Debug enabled or not");
|
|
|